get and check input as while condition

How can I get and check the user input from within the condition of a while loop?
For example, the Java equivalent would be

Code:

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BufferedReader br = new BufferedReader (new InputStreamReader(System.in));

while (Integer.parseInt(new StringTokenizer(br.readLine()).nextToken()) != 999)
              do something as long as input isn't 999

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the first line isn't important, but anyways, I just want to know how to test the input in the while loop condition.

I tried

Code:

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int a;
while ((cin >> a) != 999)

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but that only tests the input stream, not the actual value of a.
Is there another operation other than cin >> that I can use?

Thanks.

Code:

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while ((cin >> a) && a != 999)

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You'll have to call cin.clear() if the (cin >> a) part fails, as well as cin.ignore with a large value to ignore the bad characters input. You can search for examples. If you use the while exactly as laserlight showed, then both should be safe to call even if the a != 999 part is what fails.

Right, thanks guys.

Just on a side note, you should check out java.util.Scanner

Yeah, I'm still on 1.4 though.

Quote:

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Originally Posted by indigo0086

Just on a side note, you should check out java.util.Scanner

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??? how would the java scanner object help in a C++ program? This isn't a java board you know.

Quote:

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Originally Posted by King Mir

??? how would the java scanner object help in a C++ program? This isn't a java board you know.

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keyword side note, as the question was already answered.